| Comparison of Twin-block and Dynamax appliances for the treatment of Class II malocclusion in adolescents: a randomized controlled trial. | |
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MedLine Citation:
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PMID: 20691354 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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INTRODUCTION: The aim of this study was to compare the effectiveness of Twin-block and Dynamax appliances for the treatment of Class II Division 1 malocclusion. METHODS: This was a randomized controlled trial involving 32 boys and 32 girls aged 10 to 14 years with Class II Division 1 malocclusion. They were randomly allocated to either the Dynamax appliance group or the Twin-block appliance group. Treatment was provided by 4 clinicians at 2 centers. Records were taken at the start and the end of the functional phase and after all treatment. In addition, incisal overjet, the number of appliance breakages, and adverse events or side effects of the treatment were recorded at each patient visit. RESULTS: The data monitoring committee in an interim analysis at 18 months after the start of the trial found significantly greater overjet reduction in the Twin-block group than in the Dynamax group and more breakages and adverse events with the Dynamax appliance. As a result, treatment with the Dynamax appliance was terminated, and those patients completed treatment with the Twin-block or a fixed appliance. Regression analysis showed a statistically significant difference in the performance over time between the Twin-block and Dynamax appliances in terms of reduction in overjet, with the Twin-block appliance performing significantly better than the Dynamax. The incidence of adverse events was greater in the Dynamax group (82%) than in the Twin-block group (16%), with a statistically significant difference (P <0.001) between the 2 groups. CONCLUSIONS: The Twin-block appliance was more effective than the Dynamax appliance when overjet was evaluated and the Dynamax appliance patients reported greater incidence of adverse events with their appliance than those who were treated with the Twin-block appliance. |
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Authors:
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Badri Thiruvenkatachari; Jonathan Sandler; Alison Murray; Tanya Walsh; Kevin O'Brien |
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Publication Detail:
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Type: Journal Article; Multicenter Study; Randomized Controlled Trial |
Journal Detail:
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Title: American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics Volume: 138 ISSN: 1097-6752 ISO Abbreviation: Am J Orthod Dentofacial Orthop Publication Date: 2010 Aug |
Date Detail:
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Created Date: 2010-08-09 Completed Date: 2010-09-13 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8610224 Medline TA: Am J Orthod Dentofacial Orthop Country: United States |
Other Details:
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Languages: eng Pagination: 144.e1-9; discussion 144-5 Citation Subset: D; IM |
Copyright Information:
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Copyright (c) 2010 American Association of Orthodontists. Published by Mosby, Inc. All rights reserved. |
Affiliation:
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Department of Orthodontics, School of Dentistry, University of Manchester, Higher Cambridge St., Manchester, United Kingdom. badri.t@manchester.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Child Early Termination of Clinical Trials Evidence-Based Dentistry / methods Female Humans Male Malocclusion, Angle Class II / therapy* Mandibular Advancement / instrumentation*, methods Orthodontic Appliance Design* Orthodontic Appliances, Functional* Orthodontics, Corrective / instrumentation*, methods Patient Dropouts Statistics, Nonparametric Treatment Outcome |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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